2003-01-13 06:28:32 +03:00
|
|
|
#
|
|
|
|
# Check if the symbol exists in include files
|
|
|
|
#
|
|
|
|
# CHECK_SYMBOL_EXISTS - macro which checks the symbol exists in include files.
|
|
|
|
# SYMBOL - symbol
|
|
|
|
# FILES - include files to check
|
|
|
|
# VARIABLE - variable to return result
|
|
|
|
#
|
|
|
|
|
|
|
|
MACRO(CHECK_SYMBOL_EXISTS SYMBOL FILES VARIABLE)
|
|
|
|
IF("${VARIABLE}" MATCHES "^${VARIABLE}$")
|
|
|
|
SET(CHECK_SYMBOL_EXISTS_CONTENT "/* */\n")
|
|
|
|
SET(MACRO_CHECK_SYMBOL_EXISTS_FLAGS ${CMAKE_REQUIRED_FLAGS})
|
|
|
|
STRING(ASCII 35 POUND)
|
|
|
|
STRING(ASCII 40 OPEN_PARENT)
|
|
|
|
STRING(ASCII 41 CLOSE_PARENT)
|
|
|
|
SET(PARENTS "${OPEN_PARENT}${CLOSE_PARENT}")
|
|
|
|
FOREACH(FILE ${FILES})
|
|
|
|
SET(CHECK_SYMBOL_EXISTS_CONTENT
|
|
|
|
"${CHECK_SYMBOL_EXISTS_CONTENT}${POUND}include <${FILE}>\n")
|
|
|
|
ENDFOREACH(FILE)
|
|
|
|
SET(CHECK_SYMBOL_EXISTS_CONTENT
|
2003-02-17 18:30:13 +03:00
|
|
|
"${CHECK_SYMBOL_EXISTS_CONTENT}\n\nint main${PARENTS}{"
|
2003-01-13 06:28:32 +03:00
|
|
|
"\n${POUND}ifndef ${SYMBOL}\nchar ${OPEN_PARENT}*f${CLOSE_PARENT} ${PARENTS} = ${SYMBOL};\n${POUND}endif\nreturn 0;\n}\n")
|
|
|
|
WRITE_FILE(${CMAKE_BINARY_DIR}/CMakeTmp/CheckSymbolExists.c
|
|
|
|
"${CHECK_SYMBOL_EXISTS_CONTENT}")
|
|
|
|
|
|
|
|
MESSAGE(STATUS "Looking for ${SYMBOL} in ${FILES}")
|
|
|
|
TRY_COMPILE(${VARIABLE}
|
|
|
|
${CMAKE_BINARY_DIR}
|
|
|
|
${CMAKE_BINARY_DIR}/CMakeTmp/CheckSymbolExists.c
|
|
|
|
CMAKE_FLAGS
|
|
|
|
-DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_SYMBOL_EXISTS_FLAGS}
|
|
|
|
OUTPUT_VARIABLE OUTPUT)
|
|
|
|
IF(${VARIABLE})
|
|
|
|
MESSAGE(STATUS "Looking for ${SYMBOL} in ${FILES} - found")
|
|
|
|
SET(${VARIABLE} 1 CACHE INTERNAL "Have symbol ${SYMBOL}")
|
|
|
|
ELSE(${VARIABLE})
|
|
|
|
MESSAGE(STATUS "Looking for ${SYMBOL} in ${FILES} - not found.")
|
|
|
|
SET(${VARIABLE} "" CACHE INTERNAL "Have symbol ${SYMBOL}")
|
|
|
|
WRITE_FILE(${CMAKE_BINARY_DIR}/CMakeError.log
|
|
|
|
"Determining if the ${SYMBOL} "
|
|
|
|
"exist failed with the following output:\n"
|
2003-02-28 20:42:50 +03:00
|
|
|
"${OUTPUT}\nFile ${CMAKE_BINARY_DIR}/CMakeTmp/CheckSymbolExists.c:\n"
|
|
|
|
"${CHECK_SYMBOL_EXISTS_CONTENT}" APPEND)
|
2003-01-13 06:28:32 +03:00
|
|
|
ENDIF(${VARIABLE})
|
|
|
|
ENDIF("${VARIABLE}" MATCHES "^${VARIABLE}$")
|
|
|
|
ENDMACRO(CHECK_SYMBOL_EXISTS)
|